Apparatus for the formation of concrete piles in situ



J. M. DEALY March 8, 1932.

APPARATUS FOR THE FORMATION OF CONCRETE FILES IN SITU Filed June 3, 1929INVEN TOR.

A TTORNEYS.

l6, tracted by the longitudinal movement ofa- Patented Mar. 8, 1932 JOHNM DEA Y, oF-AsT'oitIA, nnwvonx, AssIeNon TO MAc nTn R-concnE'rE-rmnCORPORATION, on new Yon-Inn. Y.,ACORP03 ATION.0F DELAWARE. I

'AIPPARATUS non THE nonunion or concnnrn r ms in sun Application filedJune a, 1929. Serialli'o. 367,945.

more particularly, to apparatus comprising core leaves adaptedto beexpanded and concenter-bar. 1 c V An object of the invention istoprovide improved means for withdrawingthe leavesfof a collapsiblecoreitogether-with the centerbar; Another object: is to provideapparatus of the character, describedfwhich is'of simple and sturdyconstruction, and which operates freedom'from mechanical efliciently andwith defects. i c u Other objects. of the invention willin part be.obvious and will in part appear hereinafter. t c

- The invention accordinglycomprises the features of. construction,combinations of el e-' ments, and arrangement. of parts, which w1l1- beexemplified in the constructions hereinafter set forth'andthescopeoffthe applica-.

,tion of which will be indicated in the claims. a For a fullerunderstanding of the nature and objects ofthe invention, referenceshould be had to the following detailed description taken in connectionwiththe accompanying drawings, in which:

Figure 1 is a longitudinal section] of a collapsible core embodying theinvention, showing the same inserted in apile casing, a longi-.-

tudinal'portion of the core being broken y ,7

Fig. 2is an enlargeddetail sectional view.

of thecorehead, showing the parts in driving position ;,p

Fig. 3 is a similarviewflhowing the parts in withdrawing position;

I Fig. 1 is, a. detail, showing me(*ims as viewed from the right ofFig-'2;

Fig. 5 is a plan view of the core. 2 p I Theexemplifiedapparatuscomprises a collapsible core, indicated generally at 10, of a typesuitableto be sunk i'nto the ground either alonegor insconjunction withathin sheet metal or similar; shell, such as shown at 11,;to form acavity 'intowhich concrete may 5 be poured for the formation of aconcrete pile or the like.v The exemplified core comthe connectingelement 25 projectingfrom one of thecore prises a center-bar 12 and aplurality core leaves..13 separated longitudinally so asto permitthe-same to be expanded against the inner surface .Ofthe shell {duringdriving, s

ing-cap and the coreleavesthere is inter-i i posed a drivingeplate 19,which .ismounted on the core leaves, by means ofpins 20, me.

manner to permit. radial movement .of the leaves. In the presentinstance, the drivingplate is provided withan externaldownwardly-extending flange 21 adapted to limit the expandingmovement-of the core leaves;

' The invention contemplates the'p rovision' of means forconnectmg thedrIvmg-cap and the core leaves in such manner as 'to nsurethe withdrawalof the core leaves with the driving-cap and center-bar after the latterelements have moved upwardly a suflicient distance to permit thecollapse of theleaves.

To this end, there'is provided in the exemplified apparatusa seriesofpairs of. pivot-- ally-connected links 22 and 23, each link 22.

- being pivotally mounted on an element 24 projecting from thedriving-cap, and each link 23 being pivotally connected with an leaves.The driving-plate 19 is'formedrwith suitable recesses 26, into whichthelinks'22 and23 seat when these links are aligned by the upwardmovement-of the driving-cap By the provisionof such means, the with vdrawal of'the core leaves after the driving:

cap and center-bar have .move'd'iup a'given distance is assured, thelinks 22 and .23 3 car ryingthe weight ofithe corei leaves during, thewithdrawal of. the core from theground These links, being exteriorlymounted, can,

above description or shown in the accom- I panying drawings shall beinterpreted as illustrative and not in a limiting sense.

It is also to be Imderstood that the fol-v lowing claims are intended tocover all of the generic and specific features of the inventionhereindescribed, and all statements of the scope of the invention whichas a matter of language might be said to fall therebetween.

I. Pile-driving apparatus, comprising a center bar, a plurality of coreleaves about saidv center bar, means for causing the col lapse ofsaidcore leaves, means to cause the expansion of said core" leaves, adriving cap carried. at the upper end of said center bar,

and means connecting the upper end of each core leaf with said drivingcap andindependent of said collapsing means for sup.- porting each coreleaf from the driving cap when in collapsed position, said meansbeingcollapsible to permit a limited longitudinal movement of the core leaveswith respect to the center bar,

2. Pile driving apparatus, comprising a center bar, core leavescoll'a'psibly associated with the center bar, a driving cap secured tothe: upper end of said center bar, and a plurality of pairs of pivotallyconnected links, one of each pair of said links being pivotallyconnected with said driving cap,

' and another of each pair of said linksbeingpivotally connected withone of said core leaves, said links being so arranged that when the sameare in extended position theywill support the core leaves in collapsedpositiom I 3'. Pile driving apparatus, comprising a center bar, coreleaves collapsibly. associated with the center bar, exteriorly mountedcollapsible suspension means, and means to connect said suspension meanswith said center but and with said core leaves.

4'. Pile driving apparatus, comprising a:

center bar, core leaves collapsibly associated with the center" bar,means at the upper end of, the centerbar f-or applying thereto drivingpressure and withdrawing pull, and collapsible elements attached to eachcore leaf at the outside thereof and connected with the upper end ofsaid bar for suspending said core leaves'from said center bar.

5. Pile driving apparatus, comprising. a center bar, core leavescollapsibly associated with the center bar, a driving cap secured tothe. upperend of said center bar, sus-' pension means attached to thecore leaves at the outside thereof, and means on said driving cap forsupporting said suspension means.

6. Pile driving apparatus, comprising a center bar, core leavescollapsibly associated with the center bar, a driving cap secured to theupper end of said center her, an outwardly extending element on each ofthe core leaves, outwardly extending elements on the driving-capoverhanging the aforesaid ek ments, and collapsible suspension meansconnecting each pair of said outwardly extending elements.

7. Pile driving apparatus, comprising a center bar, core leavescollapsibly associated with the center bar, a driving cap attached tothe upper end of the center bar, a driving plate fitting between saidcenter bar and said core leaves, said driving plate bei'ng formed withrecesses in its outer surface, and means to connect said driving capwith saidfcore leaves, said connecting means being arranged to permitinward and outward movement of the core leaves, and being adapted to fitinto said recesses. 1

8. Pile driving, apparatus, comprising a center bar, core leaves collasibly associated with the center bar, a driving cap attached to theupper end of the center bar, a driving plate fitting between said centerbar and said core leaves, said ,driving plate bein center bar carryingIongitudina y-spacedwedging members, a driving cap attached to the upperend of the center bar, a plurality of core leaves surrounding saidcenter bar and formed with wedging members adapted. to co-operate' withthe aforesaid wedging members, means to effect the collapse of said coreleaves when said cent'erbar is moved longitudinally, and meansindependentof. said colla sing meansfor connecting said driving ca withsaid core leaves and adapted to permit a limited longitudinal movementbetween the two, said connecting means being adated to support said coreleaves from said cap, whereby supporting strain on the collapsing meansis avoided.

In testimony whereof I afiix my signature.

JOHN. M. DEALY.

riving

